3x = 28 - x 5x + 12 = 8x + 30 33 + 8x = -5x + 72
3x + x = 28 5x - 8x = 30 - 12 8x + 5 x = 72 - 33
4x = 28 -3x = 18 13x = 39
x = 28 : 4 x = 18 : (-3) x = 39 : 13
x = 7 x = -6 x = 3
7 - 2x = 3x - 18 2x + 9 = 2x - 4
7 + 18 = 3x + 2x 13 = 2x - 2x
5x = 25 13 = 0
x = 25 : 5 ∅
x = 5
700-400=300
300*y=2100
y=2100/300
y=7
НОД(14,21)=7 НОК(14,21)=21*2=42
2*7=14
3*7=21
НОД(22,66)=22 НОК(22,66)=66
2*11=22
2*3*11=66
НОД(39,65)=13 НОК(39,65)=65*3=195
3*13=39
5*13=65
Ответ----------☆☆☆☆☆☆☆☆☆----------